Fix for py3 more strict type checking

typedcols.py

@@ -151,7 +151,7 @@ class TypedDict(collections.MutableMapping):
         for key, tdef in self.typedef.items():
             if tdef.get("required", False) and not key in self.data:
                 missing = missing + ((key,),)
-            elif recursive and issubclass(tdef["type"], TypedDict):
+            elif recursive and isinstance(tdef["type"], type) and issubclass(tdef["type"], TypedDict):
                 try:
                     self.data[key].checkRequired(recursive)
                 except KeysRequired as e: